2009 Yamaha YZ125Y Service Manual
Wiring diagrams, specifications, and repair sequences for the YZ125Y, covering operation, inspection, and maintenance. PN LIT-11626-22-54.
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Models Covered & Key Technical Specifications
Yamaha YZ125Y (2009) Service Manual
Comprehensive Diagnostics & Repair Procedures | Wiring & Specs
- Documented Spark Plug Torque: 20 Nm
- Calibrated Cylinder Head Torque: 28 Nm
- Authorized Clutch Boss Torque: 80 Nm
- Core Front Wheel Axle Torque: 105 Nm
- Rated Rear Wheel Axle Torque: 125 Nm
- Principal Steering Ring Nut Torque: 7 Nm
Professional Workshop Service Manual & Technical Specifications
Systematic Performance Shop Manual: Yamaha YZ125Y Service Manual - Comprehensive Diagnostics & Repair Procedures (2009) Maintenance-Registry
Design-Core: YZ125Y // Model-Designation: 2009 Yamaha YZ125Y // Design-Core: Owner's Service Manual Logic.
Table of Contents Summary
- General Information
- Specifications
- Engine
- Chassis
- Electrical
Systems and Procedures
Parts identification is covered for the entire machine, including important labels and their locations. Removal procedures are documented for various components, including the front and rear brakes, and the steering system. Technical specifications are provided for engine type, displacement, bore x stroke, and compression ratio. Factory specifications are documented for clutch type, transmission gear ratios, and tire specifications. Engine rebuild procedures are documented for the cylinder head, cylinder, and piston.
Key Specifications
Engine Type: Liquid cooled 2-stroke, gasoline Displacement: 124 cm3 (4.36 Imp oz, 4.19 US oz) Bore x Stroke: 54 × 54.5 mm (2.126 × 2.146 in) Transmission Type: Constant mesh, 6-speed Front Wheel Travel: 300 mm (11.8 in) Rear Wheel Travel: 315 mm (12.4 in)
Torque Specifications
| Identifier | Technical-Path | Framework |
|---|---|---|
| Spark Plug | M14S x 1.25 | 20 Nm |
| Cylinder Head Nut | M8 x 1.25 | 28 Nm |
| Clutch Boss | M16 x 1.0 | 80 Nm |
| Front Wheel Axle Nut | M16 x 1.5 | 105 Nm |
| Rear Wheel Axle Nut | M20 x 1.5 | 125 Nm |
| Steering Ring Nut (Final) | M28 x 1.0 | 7 Nm |
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